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Articles by A.M. El-Ghamry
Total Records ( 3 ) for A.M. El-Ghamry
  Magdi. T. Abdelhamid , E.M. Selim and A.M. EL-Ghamry
  A bio-fertigation trial was conducted at the experimental farm of National Research Centre, Noubaria, Egypt during May to August of 2010 to study the relative efficacy of bio-fertigation of liquid formulation of N-fixer (Azospirillum sp. and Azotobacter sp.) and P-solubilizer (Basillus megatherium) and humic substances (HS) and inorganic fertilizers injected through drip irrigation system on soil properties and growth and yield of cowpea plant. Four treatments were utilized mainly, basal control treatment at 100% recommended dose of NPK as drip fertigation while 50% recommended dose of NPK as drip fertigation combined with bio fertigation of microbial inoculums and/or Humic Substances (HS) were injected through drip irrigation system. Application of 50% recommended dose of NPK with bio fertigation and humic substances improved nutrient contents in soil (N, P, K, Fe, Mn and Zn), plant growth, nodule parameters, seed quality and fertilizer use efficiency and nutritional assimilation of cowpea followed by 100% recommended dose of NPK, 50% recommended dose of NPK jointly with humic substances and then 50% recommended dose of NPK in combination with bio fertigation treatments. In spite of 100% recommended NPK drip fertigation improved cowpea yield solely, application of 50% recommended NPK dose in conjunction with bio fertigation and humic substances gave rather equal yield. Injection of 50% recommended dose NPK as drip fertigation in combination with biofertigation of liquid formulation and humic substances was better and comparable way than the other treatments. Bio fertigation of microbial inoculums and humic substances could be used as a complementary for mineral fertilizers to improve yield and quality of cowpea under sandy soil conditions which protect the environment chemical pollution and its harmful effect on human and animal health.
  S.E. Seadh , M.I. EL-Abady , A.M. El-Ghamry and S. Farouk
  The field experiment was conducted at Tag AL-Ezz, Agricultural Research Station Farm, Dakahlia Governorate, Agricultural Research Center, Egypt (+7 m altitude, 31° 36' latitude and 30° 57' longitude), during 2005/2006 and 2006/2007 seasons to study the effect of foliar application with micronutrients (untreated (control), spraying with water, Cu, Mn, Fe and Zn at the rate of 500 ppm of each as well as the mixture of these 4 micronutrients at the rate of 500 ppm of each) under nitrogen levels 50, 70 and 90 kg N fed-1, as well as, their interactions on yield and its components, grains quality and chemical composition of wheat cultivar Giza 168. Also, a laboratory experiment was conducted at Seed Technology Research Unit at Mansoura, Dakahlia Governorate, Field Crops Research Institute, Agricultural Research Center, Egypt, to determine germination percentage and seedling vigor tests (seed quality) of the resultant seed from field experiment. Results indicated that foliar application of the micronutrients mixture at the rate of 500 ppm produced the highest values of grain yield and its components, chemical composition as well as quality parameters of both grains and seed with significant differences compared with other foliar application treatments in both seasons. The second best treatment was the application of Zn followed by Mn in both seasons. Cu and Fe treatments were similar in their effects and the difference between them were insignificant in most traits. The highest values of both straw and grain yields and yield components as well as quality parameters of grains and seed were resulted from increasing nitrogen levels up to 90 kg N fed-1 as compared with other levels (50 and 70 kg N fed-1) in both seasons. The results under the present conditions of Tag El-Ezz show that foliar application with mixture of micronutrients in addition to fertilizing with 90 kg N fed-1 can be maximize wheat straw and grain yields and gave the best quality parameter of both grains and seed. Moreover, it can be recommended that spraying wheat plants with Cu or Mn or Fe or Zn or mixture (at the rate of 500 ppm) and adding 70 kg N fed-1, which surpassed grain yield over untreated (control) + 90 kg N fed-1.
  A.M. El-Ghamry , Abid Subhani and E. M. EI-Naggar
  A green house experiment was conducted to compare the effects of different organic residues on soil microbial biomass C (Cmic) , N (Nmic) and their ratios with total C (Corg) and N (Ntotal) in different soils. Three types of organic residues used were farmyard manure (FYM), town refuse (TR), and sewage sludge (SS), applied separately in sandy, calcareous, and alluvial soils in various concentrations of 10t/fed, 20t/fed, and 30t/fed (1fed=0.42ha). Wheat plants were harvested after 6 weeks and the soils were analyzed for Cmic, Nmic, Corg, Ntotal and pH. The addition of organic residues significantly increased the size of soil microbial biomass. The biomass C and N (Cmic & Nmic) increased consistently with increasing levels of the organic residues in the soil. The FYM was found to be more effective than TR and SS in increasing microbial biomass and this sequence was observed in all the soils used. Similarly, addition of organic residues also caused significant stimulation in Corg and Ntotal in all soils. Also, the ratios of Cmic/Nmic, Cmic/Corg percentage and Nmic/Ntotal percentage were increased with increasing levels of organic residues. The soil pH was decreased significantly with the higher rates of application in all the treatments (FYM, TR, and SS) but remained unaffected at lower rates. The linear regression between different ratios under different levels of organic residues application was also calculated.
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